46 Technical data/Brake wear limit

WM 4600TW Technical data/Brake wear limit

Technical values

















Technical data - Boxster S/Cayman S

Operating brake (foot brake):
- Dual-circuit brake system with brake-circuit division per axle.
- Internally ventilated and perforated grey cast iron brake discs on front and rear axle.
- Four-piston monobloc caliper on front and rear axle.
- The brake calipers are painted red for visual differentiation.
- Standard Porsche Stability Management (PSM 8.0).





Test values/wear limits - Boxster S/Cayman S

Information

Depending on the wear of cast iron brake discs, two condition criteria can make replacement necessary:

- Cracking in the holed (perforated) brake disc friction plates is in an advanced state.

- Minimum brake disc thickness is not retained due to wear (material erosion due to friction).





Information on machining cast-iron brake discs

Possible complaints
- Damage due to lack of use (rusting). This causes vibrations in the steering wheel, noises and brake pedal pulsation.
- Brake disc becomes distorted as a result of serious driving, e.g. on a racing circuit.
- Too much lateral runout when new brake discs are fitted on dirty or distorted wheel hubs.

Procedure
- Check brake disc for cracks, minimum thickness, lateral runout, thickness tolerance, flatness and surface roughness.
- If necessary, (depending on the actual brake disc thickness and the brake disc wear limit) machine the brake disc using one of the disc brake dressing machines approved by Porsche. For a list of recommended disc brake dressing machines, see Tools and Equipment.
- The brake disc must only be reworked symmetrically, i.e. equally from both sides! Observe the operating instructions for the disc brake dressing machine!

Technical data for Boxster S/Cayman S - PCCB brakes (option)

Operating brake (foot brake):
- Dual-circuit brake system with brake-circuit division per axle.
- Internally ventilated and perforated PCCB brake discs on front and rear axle.
- Six-piston monobloc caliper on front axle and four-piston monobloc caliper on rear axle.
- The brake calipers are painted yellow for visual differentiation.
- Standard Porsche Stability Management (PSM 8.0).





Test values/wear limits for Boxster S/Cayman S - PCCB brakes

Information

The following condition criteria can make replacement necessary depending on the wear of the PCCB brake discs:

- Surface changes in the brake disc friction surfaces at an advanced stage.

- Minimum brake disc thickness is not retained due to wear (material erosion due to friction).